My son got one of those "facts" books at Chritmas. One section on the planets says Jupiter rotates every 10 hours.
The Earth of course rotates every 24 hours, so our "days" are built round roughly 8 hours sleeping, 8 hours at work, and 8 hours for "everything else".
But I began to wonder what what have happened to us if the Earth rotated every 10 hours, and we had 5 hours daylight and then 5 hours darkness.
Would we sleep for roughly 3 hours every night, work for roughly 3 hours and do everything else in the remaining 3 or so hours?
If we only worked for only 3 hours each day by the time you got to work it would almost be time to leave.
Can anyone else think of "strange" behaviour if our "day" was only 10 hours?